If you are in North America:
They may want you to submit a 'part request' for a new sliding door assy instead if it's somnething they think you can replace yourself.
If not in N. America, you can follow the suggestion on that page.
I'm going to disassemble the front panel this weekend and see what can be done but first I thought that maybe someone encountered similar problem and can give some useful advice about how to fix it best way.
It's actually not the first Cooler Master case I own. And each and every one of them had something rattling. So I'm kind of used to deal with this kind of problems myself. This time it'll just take a bit more effort to take this sliding panel out since as I can see you can't get it out without taking the buttons panel away first.
Edited by Nelrum - 10/2/13 at 1:18am